Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2351
Number of amino acids:36
Molecular Weight:3708.33 Da
Theoretical pI:6.7


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)25.56%
Cysteine CYS (C)616.67%
Glutamic Acid GLU (E)12.78%
Aspartic Acid ASP (D)12.78%
Glycine GLY (G)411.11%
Phynylalanine PHE (F)25.56%
Isoleucine ILE (I)38.33%
Histidine HIS (H)12.78%
Lysine LYS (K)12.78%
Methionine MET (M)00%
Leucine LEU (L)12.78%
Asparagine ASN (N)00%
Glutamine GLN (Q)25.56%
Proline PRO (P)513.89%
Serine SER (S)411.11%
Arginine ARG (R)12.78%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)25.56%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC158
HydrogenH248
NitrogenN44
OxygenO47
SulphurS6

FormulaC158H248N44O47S6
Total Number of Atoms:503


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    375
Absorption 0.1% (=1 g/l)    0.101,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.056

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 56.90

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.22, 36.11, 11.11]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:65
Grand average of hydropathicity (GRAVY):0.32